Security industry insiders have long known the Mac platform has its holes. The Flashback Trojan is the first in-the-wild issue that's confirmed this, and big-time. More will follow unless Apple steps up its game.

It's long been known that Macs aren't impervious to malware, and a recent fake antivirus program calling itself MacDefender appears to have affected more people than previously thought. Here's how to clean your Mac.